JPH06508521A - Automatic removal device for milking means - Google Patents

Abstract

PCT No. PCT/SE92/00457 Sec. 371 Date Dec. 20, 1993 Sec. 102(e) Date Dec. 20, 1993 PCT Filed Jun. 23, 1992 PCT Pub. No. WO93/00002 PCT Pub. Date Jan. 7, 1993.A device for automatic removal of a milking apparatus (6) comprises an operating unit (2) having a cord drum with a cord (13), and a driving motor for turning the cord drum for winding the cord on the latter. The free end of the cord is connected to the milking apparatus, whereby the cord pulls the milking apparatus off the teats of the animal as the cord drum is turned by the driving motor. According to the invention, the driving motor comprises a pneumatically operated motor. The advantage is that the operating unit can be made compact and with a low weight, and that the milker can unwind the cord without any substantial resistance from the motor when the motor is inactivated.

Description

[Detailed description of the invention] Automatic removal device for milking means The present invention provides an apparatus for automatically removing the milking means from the teat of an animal after milking is finished. Regarding the location. The removal device is attached to one frame and to that frame. Contains an activated operating unit. Its actuation unit is a rotatable cord driver. The cord wraps around the cord drum and has a free end for connecting to the milking means to be removed. A single cord with a connecting member for the milking means and the milking means separated from the animal's teat. The cord drum was designed to rotate in order to wind up the cord so that it could be It has a driving means.

A removal device of this type is known from DD 233480. Its known guise The device is compact and therefore portable for milking tethered cows. It is particularly suitable as milking equipment. However, the device has serious drawbacks. . This is because the driving means for winding the cord is a relatively strong spiral winder. This is because it is made up of springs. As a result, milkers have to unwinding the cord to connect the coupling member to the milking means attached to the teat; In some cases, the spiral spring must be tightened.

The reason why spiral springs must be relatively strong is that The weight of modern milking means consisting of cup, hose, and tailored cup claw The fact is that it weighs about 3 kg. Therefore, the spiral spring has at least 5 The milking machine must be able to generate a pulling power corresponding to kg. Each time the milking means is attached to a cow to be milked, the spiral spring is Of course, it is hard work for the milker to tighten the belt against the power of the cow. become.

The object of the invention is to provide a milking device which is easy to connect to a milking means attached to the teat of a cow. We present a device for the automatic removal of milking means, compact and lightweight. It is to provide.

This objective firstly provides that the drive means comprises a pneumatically actuated motor. This is achieved by a device of the kind described above, characterized in that: As a result, the motor When not in operation, the cord coils easily with no substantial resistance from the motor. can be unraveled. The motor applies pulsating pressure into the teat cup of the milking means. can be suitably coupled to a vacuum conduit providing a passageway for the air necessary to produce .

Preferably, the pneumatically operated motor is a rotating slide vane type motor. , thereby allowing the automatic removal device to be designed particularly compactly do. (Alternatively, the motors may be arranged, for example, in the shape of a cross and a slide in the center of the i.e. coupled to it to rotate the chord drum consisting of four piston-cylinder means engaged with a slidable slide. It consists of several small piston-cylinder means in a familiar arrangement, such as ).

The motor can be driven to the code drum via a reduction gear (a planetary gear is suitable) Advantageously, it is engaged with the function. The gear ratio of the reduction gear device is from 1:3 to l28 The choice should be made between The reduction gearing has a relatively large diameter core. Enables use of drums.

This means that the rotational moment required to rotate the cord drum is This leads to the fact that it remains almost constant throughout the entire process. Because that The diameter of the coil of cord formed on a large coil drum is This is because there is only a very small increase. As mentioned above, the rotational moment remains unchanged. As a result, the rotational speed of the rotating slide vane type motor is The motor is kept almost constant during the ensure that the output is obtained.

What you should be careful about in this regard is the addition of the cord drum to rotate. In order to compensate for the large rotational moment, the rotating sliding vane type motor is It is said that the power cannot be increased by increasing the pressure difference across the motor. That is true. That is, the existing vacuum conduit to which the motor is to be coupled is normally We are distributing a maximum vacuum of 50 kPa, and is it possible to increase the degree of vacuum? It is et al. Additionally, more powerful motors are an alternative to enable greater power output. It would be inappropriate to select a Because if you do that, The removal device is heavier.

This is because it becomes larger.

According to one preferred embodiment of the removal device according to the invention, the motor has multiple It has a rotor shaft provided with many vane pairs. Vanes in each vane pair are slidable along the same radial direction relative to the rotor shaft. one The housing forms a cylindrical rotor chamber in which the rotor shaft A shaft extends parallel to the central axis of the rotor chamber. The rotor chamber , the vanes allow individual chips arranged one after the other around the rotor shaft. It is divided into chambers. The vanes in each vane pair are connected to each other via a spacing member. Preferably, the vanes are opposite each other, so that each pair of vanes is can slide radially relative to the rotor shaft together with the spacing member. Form one unit that can. As a result, the operation of the slide vane type motor The frictional resistance between the vanes and the rotor chamber wall during the A conventional slide vane motor that is pressed against the wall of the chamber by spring force. It is relatively weak compared to the case of -.

The distance that the cylindrical rotor chamber extends across the rotor shaft is , is suitably approximately constant along the circumference of the rotor chamber, so that The rotor chamber has a slightly oval cross-sectional shape.

In the following, the removal device according to the invention will be explained in more detail with reference to the attached drawings. In one drawing illustrating the present invention, FIG. 2 shows a side view of the actuating unit of the removal device of FIG. 1; FIG. and I31+3 shows a top view of the actuating unit of the removal device of FIG. 4 shows a longitudinal cross-sectional view of the actuating unit of FIG. 2, and FIG. A cross-sectional view taken along the line v-■ is shown.

The milking device shown in FIG. 1 includes a frame 1 in which an actuating unit is A knit 2 and control means 3 are attached. Frame l is secured by clamp 4. It can be suspended from an existing conduit, for example a vacuum conduit 5. four tees The milking means 6 includes a teat cup 7 and a teat cup claw 8; A hose 9 and a pulsation hose 10 are each attached to the frame 1. It extends to a milk flow meter 11 and a pulsator 12. One code 13 1 extending from the actuating unit 2 to the teat cup claw 8 and to the coupling member 14. Therefore, they are combined.

Milk hose 15 and air hose 16 are connected to milk flow meter 11 and pump, respectively. From Luceta 12 upwards.

It extends to a coupling member 17 arranged on the milk conduit 18 . hoses 15 and 16 The upper end is provided with means for quick engagement with the coupling member 17. Coupling member 17 connects the milk hose 15 and air hose 16 to the milk conduit 18 and vacuum conduit, respectively. Suitable for coupling to tube 5.

The actuation unit 2 includes a pneumatically actuated rotary slide vane type motor 19 and a cord. a planetary gear system connected between the code drum 2o, the motor 19 and the code drum 20; 21.

The motor 19 has a rotor shaft 22 with a cylindrical mantle 23 attached thereto. are doing. Inside the mantle 23 are two pairs of opposing ports extending in directions perpendicular to each other. There are four radial pockets 24 arranged in the shape of a pocket. four vanes 2 5 to 28 can slide within the pocket 24. pairs of opposing vanes 25.27 and 26.28 are two cylindrical bins 29.30 and 31.3 They face each other with a two-shaped spacing member interposed therebetween. As a result, the number of vanes Pairs 25.27 and 26.28 are combined with bins 29.30 and 29.30 in their respective pairs. and 31, 32, which can slide radially relative to the rotor shaft 22. They form a single unit.

The motor 19 further has a housing 33, which has a cylindrical shape. A rotor chamber 34 is formed in which the rotor shaft 22 is rotated. a cylindrical rotor chamber extending parallel to the central axis of the rotor chamber 34; The extension distance of the bar 34 in the direction transverse to the rotor shaft 22 is substantially constant along the circumference of the rotor chamber 34, thereby causing the rotor chamber 3 4 has a slightly oval cross-sectional shape. Rotor chamber 34 are placed sequentially around the rotor shaft 22 by vanes 25-28. It is divided into four separate chambers 35-38. Vanes 25 to 28 are a resilient sealing strip 39 located at the radially outer end of the vanes; This seals the cylindrical wall of the rotor chamber 34.

Each pocket 24 is axially bounded by two opposing walls 40°41, which The radially outer ends of the walls cover the two circular surface portions 42, 43 of the mantle 23. The 6-housing 33, which is a hollow part, is concentric with the rotor shaft 22, and In the direction, there are two positions located in front of the circular surface portions 42 and 43 of the mantle 23, respectively. It is formed with two inner circular shoulder portions 44,45. housing The shoulder portion 44.45 of the gear 33 is in close contact with the surface portion 42.43 of the mantle 23. extending to thereby provide a seal between the individual chambers 35-38. .

The housing 33 has an inlet member 46 for the atmosphere.

Inlet member 46 is connected to rotor chamber 34 via an inlet passage 47 . Furthermore, the housing 33 has an outlet member 48 for connection to a vacuum source.

The outlet member 48 is connected to the rotor chamber 34 via an outlet passage 49. .

One end of the rotor shaft 22 is formed to have a gear ring 50. , the gear ring 50 serves as a sun gear of the planetary gear system 21. planetary gear The device 21 has a stationary gear ring 51 formed in the housing 33 . Three planetary gears 52 are mounted on the code drum 20 to determine the axis of rotation of the code drum 20. Journal supported at equal radial distance from the line, gearing 50.51 are meshed with each other. The gear ratio of the planetary gear unit 21 is 1:5, which means , as a result, the rotor shaft 22 is rotated 5 times by the motor 19. This means that the code drum 20 is rotated once every time.

The cord drum 20 is provided with a mounting hole 53 through which the cord can be inserted. One end of 13 is inserted.

This allows the cord 13 to be wrapped around the cord drum 20. housing 33 is provided with an opening 54, which allows the cord 13 to be opened between unwinding and winding. The door 13 passes through the opening 54.

This new removal device is operated as follows. First, the milker milks the milk. The milking equipment is suspended from the vacuum conduit 5 by the clamp 4 near the cow to be processed. Geru. The milker then removes the milking means 6 from the frame 1 and uses it to milk the cow. The cord 13 is then unwound from the cord drum 20. motor -19 is not operating at this stage, so while unwinding the cord 13, Additionally, the motor exerts only a slight braking resistance on the cord drum 20. milker When the teat cup 7 has been attached to the cow's teat, milking begins and the teat cup 7 is removed. The milk was collected by teat cup claw 8, milk hose 9. milk flow me through the milk hose 15 and into the milk conduit 18 through the coupling member 17. It will be revealed.

At the end of milking, the milk flow meter 11 detects that the milk flow has stopped. and gives a signal to the control means 3. The control means 3 controls the outlet member 48 to The motor 19 is activated by connecting it to the vacuum conduit 5 through the base 16. Ru. As a result, individual channels in and communicating with the outlet passage 49 A negative pressure is created within the chambers 35-38. Therefore, as shown in Figure 5 In the rotating position, a negative pressure is created in chambers 35 and 38, so that the rotor shaft Shaft 22 is rotated counterclockwise. The rotor shaft 22 allows free play. Since the cord drum 20 is rotated through the star gear device 21, the cord 13 is rotated. the teat cup means 6 is pulled away from the cow's teat.

When the cord 13 is completely wound on the cord drum 20, nevertheless The milker's milking motor 19 is still in operation, but it is not This is until the stage 6 is completely suspended from the frame l.

(Alternatively, code 13 can be set to code 13 when the motor is deactivated. A retaining member may be provided to prevent the winding from unraveling. In this case, the milker shall be responsible for such the milker removes the retaining member), then the milker removes the clamp 4 and the hose 15. ．． 16 is detached from the vacuum conduit 5 and the coupling member 17.

Transport the milking equipment to the next cow to be milked.

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Claims (1)

[Claims] 1. A device for automatically removing the milking means (6) from the animal's teat after milking has finished. a frame (1), a cord drum attached to the frame and rotating; (20), wrapped around the cord drum and connected to the milking means to be removed; a cord (13) comprising at its free end a connecting member (14) for drive means arranged to rotate the cord drum for winding (19; 21), in which the cord drum is rotated by drive means. When turned, the cord engages the drive hand in a device for extracting the milking means from the animal's teat. Device characterized in that the stage has a pneumatically operated motor (19). 2. The pneumatically operated motor is a rotating slide vane type motor (19). The device according to claim 1, characterized in that: 3. The motor (19) drives the cord drum (20) via the reduction gear (21). 3. Device according to claim 1 or 2, characterized in that they are movably engaged. 4. Claim 3, characterized in that the reduction gear device is a planetary gear device (21). equipment. 5. The gear ratio of the planetary gear device is selected between 1:3 and 1:8. 5. The device according to claim 4. 6. The motor (19) is a rotor shaft comprising multiple pairs of vanes (25-28). The vanes of each vane pair (25, 27; 26, 28) are attached to the rotor. - capable of sliding along the same radial direction relative to the shaft, and , having a housing (33) forming a cylindrical rotor chamber (34); The rotor shaft extends parallel to the central axis of the rotor chamber and - separate chambers (located side by side around the rotor shaft by vanes) 35 to 38) in the device according to any one of claims 2 to 5, The vanes of each vane pair (25, 27; 26, 28) are connected to the spacing member (29, 30; 31, 32), each pair of vanes is sliding radially relative to the rotor shaft with the spacing member One unit (25, 27, 29, 3026, 28, 31, 32) that can A device characterized by forming. 7. of the cylindrical rotor chamber (34), across the rotor shaft (22). The extension distance in the direction of rotation is approximately constant along the circumference of the rotor chamber. 7. The device according to claim 6, characterized in that: 8. The rotor shaft (22) has a radius inside which the vanes (25-28) are arranged. It has a cylindrical mantle (23) with directional pockets (24), each pocket is axially bounded by two opposing walls (40, 41) and radially outwardly The ends of the mantle constitute part of the two circular surfaces (42, 43) of the housing. 33 is concentric with the rotor shaft, and in the axial direction is the circular surface of the mantle. It has two inner circular shoulders (44, 45) located on the front side of the face part. The shoulders of the housing are in close contact with the surface of the mantle. The chambers (35 to 38) are extended to form a seal between the individual chambers (35 to 38). The apparatus according to claim 6 or 7.